KR20240054737A - a solenoid valve - Google Patents

Abstract

The present invention includes a housing; a driving unit including a core disposed inside the housing, a bobbin surrounding the core, and a coil portion provided to surround an outer peripheral surface of the bobbin; a valve unit including a plunger that is provided to reciprocate according to the operation of the solenoid driving unit, and a valve head that is coupled to the plunger to open and close a bypass passage; It provides a solenoid valve, wherein the valve head has a pressure equalization hole formed around the plunger to communicate with a bypass passage and a movable space in which the valve head can reciprocate within the housing.

Description

solenoid valve{a solenoid valve}

The present invention relates to a solenoid valve, and to a solenoid valve that can improve the responsiveness of the solenoid valve.

Generally, a solenoid valve includes a solenoid driving part that generates electromagnetic force, and a valve unit that performs opening and closing operations by the solenoid driving part.

This solenoid valve appears in Korean Patent No. 10-1011641.

When this solenoid valve is installed on the turbocharger compressor side, it serves as a bypass valve.

That is, the compressor of the turbocharger is placed on an intake manifold that introduces fresh air, and an air control valve (throttle valve) that can control the inflow amount of fresh air is provided on the intake manifold.

Depending on the opening and closing operation of the air control valve, the pressure inside the pipe connected to the turbocharger compressor changes. Typically, when the turbocharger compressor operates, the solenoid valve closes the bypass passage.

While the turbocharger compressor is operating, if the air inflow is reduced or stopped due to the closing of the air control valve, the turbocharger may receive a shock, so the bypass valve is opened to communicate the inlet flow path and the discharge flow path.

However, when opening and closing such a bypass passage, the solenoid valve must respond quickly in relation to changes in air flow and pressure around the bypass passage, but in the case of conventional solenoid valves, such response performance is unsatisfactory. Problems are being raised.

Korean Patent No. 10-1011641 (registered on January 24, 2011)

The present invention is intended to solve this problem. More specifically, the present invention is to form a pressure equalization hole communicating vertically or horizontally in the valve head of the solenoid valve to increase the speed of reaching pressure equalization in the process of opening and closing the bypass passage. The purpose is to provide a solenoid valve that can improve the response performance of the valve by increasing it.

The present invention for achieving this purpose includes a housing; a driving unit including a core disposed inside the housing, a bobbin surrounding the core, and a coil portion provided to surround an outer peripheral surface of the bobbin; a valve unit including a plunger provided to reciprocate according to the operation of the solenoid driving unit, and a valve head coupled to the plunger to open and close a bypass passage; It provides a solenoid valve, wherein the valve head has a pressure equalization hole formed around the plunger to communicate with a bypass passage and a movable space in which the valve head can reciprocate within the housing.

The valve head includes a side wall whose cross-section is hollow and circular, and an upper wall that covers the upper part of the side wall but whose center is coupled to the lower end of the plunger, and the pressure equalization hole penetrates the upper wall. It may include at least one or more of a plurality of first through holes formed to do so and a second through hole formed on a side wall adjacent to the first through hole.

The pressure balance hole may be formed to have different sizes from the first through hole and the second through hole.

The first through hole and the second through hole may be formed to have the same size or area.

The first through hole and the second through hole may be arranged to communicate with each other.

The valve head includes a reinforcing portion connecting the first through hole and another adjacent first through hole on the upper wall, and an interference protrusion that protrudes in the circumferential direction from the tip of the reinforcing portion so as to protrude beyond the outer peripheral surface of the side wall. can do.

According to the solenoid valve according to the present invention,

First, by forming a pressure equalization hole in the valve head, the speed of pressure equalization can be increased in the process of opening and closing the valve pass passage, thereby increasing the responsiveness to reach pressure equalization.

Second, the movement path of the fluid can be expanded by dividing the pressure equalization hole into a first through hole and a second through hole and forming them on the upper wall and the side wall, respectively.

Third, the response performance of the valve can be improved by maintaining pressure balance within the solenoid valve.

1 is a perspective view showing a solenoid valve according to a first embodiment of the present invention.
Figure 2 is an exploded perspective view of the solenoid valve shown in Figure 1.
FIG. 3 is a longitudinal cross-sectional view showing region II' of the solenoid valve shown in FIG. 1.
FIG. 4 is a partially enlarged view showing the valve head of the solenoid valve shown in FIG. 2.
FIG. 5 is a longitudinal cross-sectional view showing a region II-II' of the solenoid valve shown in FIG. 4.
FIG. 6 is a reference diagram showing a partially enlarged valve head portion of the solenoid valve shown in FIG. 3.

Since the present invention can be subject to various changes and can have various embodiments, specific embodiments will be illustrated and described in the drawings.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms.

The above terms are used only for the purpose of distinguishing one component from another.

For example, the second component may be referred to as the first component without departing from the scope of the present invention, and similarly, the first component may also be referred to as the second component.

The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be.

On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, embodiments will be described in detail with reference to the attached drawings, but identical or corresponding components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted.

Figure 1 is a perspective view showing a solenoid valve according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing the solenoid valve shown in Figure 1, and Figure 3 is a section II' of the solenoid valve shown in Figure 1. This is a cross-sectional view.

Referring to Figures 1 to 3, the solenoid valve (1) according to the present invention includes a housing (10) mounted on a block (B) equipped with a bypass passage (BP) of the turbocharger, and a housing (10) inside the housing (10). It includes a solenoid driving unit 100 that is accommodated, and a valve unit 200 that opens and closes the bypass passage (BP) by reciprocating motion by the solenoid driving unit 100.

The solenoid driving unit 100 moves the valve unit 200 by generating electromagnetic force through a control signal and current supply when an external connector (not shown) is coupled to the power terminal 12 provided on one side of the housing 10.

First, the solenoid driving unit 100 includes a core 110 located inside the housing 10, a bobbin 120 surrounding the core 110, and a coil portion 122 provided to surround the outer peripheral surface of the bobbin 120. Includes.

And, inside the core 110, a stud 300 is provided to be fixed in the form of a shaft or rod. The stud 300 movably supports the valve unit 200, which moves according to the operation of the solenoid driving unit 100. , plays a role in guiding reciprocating motion.

The core 110 has a stud 300 inserted therein, a plunger 202, which is a component of the valve unit 200, is selectively inserted, and a first internal space defining the movable space of the plunger 202 ( 111) and a second internal space 112 disposed between the first internal space 111 and the inner peripheral surface.

A spring 130 is partially inserted and supported in the second internal space 112. The spring 130 serves to provide elastic force to the valve unit 200, and when power is supplied to the solenoid driving unit 100, The valve unit 200 allows the bypass flow path (BP) to be closed.

The inner diameter of the first internal space 111 is larger than that of the second internal space 112 and is larger than the outer diameter of the plunger 202 to provide a space in which the plunger 202 can operate smoothly. .

A part extending from the body of the core 110 is formed around the first internal space 111, and this part forms the first internal space 111, and magnetic force is concentrated in this part.

A plate portion 133 is disposed below the bobbin 120 to fix it so that it can be stably positioned within the housing 10, and a through hole 133a is formed in the center thereof to provide a space in which the plunger 202 can move. forms. The yoke side 150 is disposed to surround the outside of the coil portion 122 and the bobbin 120, and the upper part of the yoke side 150 is coupled to surround the side of the yoke 125.

An extension portion 133b is formed on the inner peripheral surface of the through hole 133a, is spaced apart from the plunger 202, faces the outer peripheral surface of the plunger 202, and is arranged to surround the plunger 202.

As will be described later, the space inside the solenoid drive unit 100 and the space between the solenoid drive unit 100 and the valve unit 200 (or The valve head operation space) 140 may be in communication.

The valve unit 200 includes a plunger 202 that can be moved by the magnetic force of the solenoid driving unit 100, a bush 204 between the plunger 202 and the stud 300, and one end of the plunger 202. It includes a valve head 210 that is fixedly coupled.

The valve head 210 is coupled to the end of the plunger 202 through a washer 220.

The spring 130 is disposed between one end of the bush 204 and the second internal space 112 of the core 110 to provide an elastic force to push the valve unit 200 outward.

The valve head 210 is provided in a cap shape and provides an internal space with one side (lower direction) open.

The side wall of the valve head 210 forms a shape surrounding its internal space.

The valve head 210 is surrounded by a flange portion 11 of the housing and a cover 20 coupled to the housing 10.

The valve head 210 moves along the reciprocating motion of the plunger 202, and in this case, the seal between the valve head 210 and the cover 20 must be maintained.

In other words, the valve head 210 must move freely while being sealed, and for this purpose, the seal adopts a so-called lip seal structure. The sealing member 400 in the form of a lip seal is in close contact with the inner surface of the cover 20 and the outer peripheral surface of the valve head 210.

By adopting such a sealing member 400, the space between the cover 20 and the valve head 210 can be sealed while the valve head 210 reciprocates.

The cover 20 is fixed by being inserted into the mounting groove 10a provided on one surface (lower or upper surface) of the housing 10.

Meanwhile, the portion where the housing 10 and the cover 20 are coupled must also be sealed, and for this purpose, auxiliary sealing members 410 and 420 in the form of O-rings are disposed inside the coupling structure.

The stud 300 is disposed along the center of the solenoid driving unit 100 and the center of the valve unit 200, and is positioned to span the area where the two components are disposed.

At least part of the stud 300 is provided in the form of a tube or hollow shaft with an empty space formed therein, and a communication passage 302 is formed therein.

And, a first opening 311 communicating with the internal space of the valve head 210 is provided at one end of the stud 300.

A second opening 312 is formed in the stud 300. The second opening 312 may be formed to penetrate the surface of the outer peripheral surface of the stud. Here, a plurality of second openings 312 may be formed on the outer peripheral surface of the stud, and their arrangement heights may be different.

The communication passage 302 serves to communicate the first opening 311 and the second opening 312 (and/or the third opening 313), thereby allowing the space around the valve unit 200 (in detail, air pressure in the space formed by the valve head 210) and the inner space of the housing 10 (specifically, the inner space of the solenoid drive unit 100, and the operation of the valve unit formed between the solenoid drive unit 100 and the valve unit 200) The pressure of the space (the first internal space 111, the valve head operation space 140, and the space between the solenoid drive unit 200 and the inner surface of the housing 10) may be balanced.

For smooth air communication, positioning of the second opening 312 is important.

For this purpose, when the second opening 312 is formed on the outer peripheral surface of the stud 300, its location is at least one of the first internal space 111 or the second internal space 112 of the core 110. It is preferable that it be formed in the region or both.

However, if implemented in an area where the second internal space 112, which is not affected by the movement of the plunger 202, is formed, the movement of air may become smoother.

The valve head movable space 140 is formed by a space surrounded by the flange 11 formed at the inlet of the housing 10, one surface of the valve head 210, the plate 133, and the plunger 202.

The valve head movable space 140 communicates with the first internal space 111, which communicates through the space between the plunger 202 and the extension 133b of the plate 133 described above.

Therefore, when air outside the valve unit 200 enters through the first opening 311 and the communication passage 302, it enters the first internal space 111 and the valve unit operation space 140 to maintain pressure balance. It comes true.

Meanwhile, the third opening 313 may be formed at the other end of the stud 300 (the upper end of the stud in the drawing).

In this case, a separation space is formed between the inner surface of the housing 10 and the core 110, between the inner surface of the housing 10 and the yoke 125, and between the inner surface of the housing 10 and the plate 133. Thus, the space 140 between the third opening 313 and the valve head may be communicated.

A power terminal 12 is provided on the side of the housing 10. Inside the power terminal 12, a plurality of terminals 13 are provided to which external connectors are connected to supply control signals or power. This terminal 13 may be connected to the resistor 113 or the coil unit (see FIG. 2, 122).

The housing 10 made of resin and the power terminal 12 made of metal can be molded using an insert injection method.

Additionally, a mounting portion 121 is provided on the top of the bobbin 120 to be adjacent to the power terminal 12. The mounting portion 121 may be formed integrally with the bobbin 120. A terminal 13 and a register 113 are fixed to the mounting portion 121.

The terminal 13 is made of a metal material because electrical connection must be made.

FIG. 4 is a partially enlarged view showing the valve head of the solenoid valve shown in FIG. 2, FIG. 5 is a longitudinal cross-sectional view showing region II-II' of the solenoid valve shown in FIG. 4, and FIG. 6 is a solenoid shown in FIG. 3. This is a reference diagram showing a partially enlarged valve head portion of the valve.

Referring to FIGS. 4 to 6, the valve head 210 includes a hollow cylindrical side wall 211, an upper wall 212 coupled to the lower end of the plunger 202 at the top of the side wall 211, and It includes a pressure equalization hole 213 provided on the side wall 211 and the upper wall 212 to communicate with the bypass passage BP and the movable space 140.

The valve head 210 is roughly cap-shaped, has an empty interior, is open downward, and is arranged to selectively open and close the bypass passage BP.

And, the pressure equalization hole 213 includes a first through hole 214 formed on the upper wall surface 212 and a second through hole 215 formed on the side wall surface 211. That is, the pressure equalization hole 213 is formed on the side wall 211 along with the upper wall 212.

A radially formed reinforcing portion 216 is provided on the upper surface of the upper wall 212, and a first through hole 214 is formed between the reinforcing portion 216 and another adjacent reinforcing portion. Accordingly, a plurality of first through holes 214 are arranged at equal intervals or equal angles on the upper wall 212. In this embodiment, five first through-holes 214 and five reinforcement portions 216 are provided on the upper wall 212 as an example, and the number of them is not limited thereto.

The reinforcement portion 216 can compensate for the decrease in the coupling force connecting the valve head 210 to the plunger 202 due to the first through hole 214 formed in the upper wall 212, and the It is possible to provide a function of firmly supporting between the upper wall 212 and the side wall 211 even for rapid opening and closing operations.

An interference protrusion 217 is provided on the outer periphery of the upper wall surface 212 and protrudes further than the outer periphery of the side wall surface 211. The interference protrusion 217 is arranged to interfere with at least the inner peripheral surface of the cover 20, and more preferably is also disposed on the sealing member 400 that seals between the cover 20 and the side wall surface 211 on the inside of the cover 20. There may be interference.

Although not shown in the drawing, the thickness of the area where the first through hole 214 is located on the upper wall 212 may be thinner than the thickness of areas other than the first through hole 214. This can be applied to minimize the weight of the valve head 210 and achieve quick response according to the opening and closing operation.

A second through hole 215 is formed on the side wall 211 to correspond to the position of the first through hole 214 on the upper wall 212. Since the height of the second through hole 215 viewed from the side wall 211 can approximately correspond to the thickness of the upper wall 212, the first through hole 214 and the second through hole 215 are positioned according to the viewing position. It may appear as one configuration, but from the perspective of the position of the upper wall 212 and the side wall 211 and the movement path of the fluid, the function and effect of the second through hole 215 are similar to those of the first through hole 215. A clear difference can be felt compared to the one formed only by (214). The first through hole 214 may be formed in a larger size or area than the second through hole 215. Of course, the second through hole 215 may be formed larger than the first through hole 214, or the first through hole 214 and the second through hole 215 may be formed of the same size.

First, the first path (P1) of the fluid shown as an example in FIG. 6 represents the direction in which most fluid moves through the first through hole (214) between the movable space (140) and the bypass passage (BP). , the second path (P2) represents the direction in which the fluid moving in the horizontal or diagonal direction in the bypass flow path (BP) partially moves through the second through hole (215).

That is, since the movement of fluid to the second path (P2) can be smoothened additionally through the second through hole 215, the fluid can be moved through the first path (P1) only through the first through hole 214. Compared to achieving pressure balance by moving the fluid, the fluid can be moved more effectively, and the pressure due to the movement of the valve head 210 can be relatively reduced.

Therefore, according to the solenoid valve according to the present invention, it is possible to maintain pressure balance in the process of opening and closing the valve path passage by forming a pressure equalization hole in the valve head, and dividing the pressure equalization hole into a first through hole and a second through hole. By forming them on the upper wall and the side wall, respectively, the movement path of the fluid can be expanded, and the response performance of the valve can be improved by maintaining pressure balance within the solenoid valve.

In the above, specific embodiments have been shown and described to illustrate the technical idea of the present invention, but the present invention is not limited to the same configuration and operation as the specific embodiments as described above, and various modifications may be made without departing from the scope of the present invention. It can be carried out within. Accordingly, such modifications should be considered to fall within the scope of the present invention, and the scope of the present invention should be determined by the claims described below.

1: Solenoid valve
10: Housing 12: Power terminal
13: terminal
100: solenoid driving unit 110: core
120: Bobbin 121: Mounting part
121a, 121b: step portion 130: spring
200: valve unit 210: valve head
211: upper wall 212: side wall

Claims (6)

housing;
a driving unit including a core disposed inside the housing, a bobbin surrounding the core, and a coil portion provided to surround an outer peripheral surface of the bobbin;
a valve unit including a plunger provided to reciprocate according to the operation of the solenoid driving unit, and a valve head coupled to the plunger to open and close a bypass passage; Including,
A solenoid valve, wherein the valve head has a pressure equalization hole formed around the plunger to communicate with a bypass passage and a movable space in which the valve head can reciprocate within the housing. In claim 1,
The valve head includes a side wall whose cross-section is hollow and circular, and an upper wall that covers the upper part of the side wall and whose center is coupled to the lower end of the plunger,
The pressure equalization hole includes at least one or more of a plurality of first through holes formed to penetrate the upper wall and a second through hole formed on a side wall adjacent to the first through hole. solenoid valve. In claim 2,
The pressure equalization hole is,
A solenoid valve, wherein the first through hole and the second through hole are formed in different sizes. In claim 2,
A solenoid valve, wherein the first through hole and the second through hole are formed to have the same size or area. In claim 2,
A solenoid valve, characterized in that the first through hole and the second through hole are arranged to communicate with each other. In claim 2,
The valve head is,
a reinforcement portion connecting the first through hole and another adjacent first through hole on the upper wall;
A solenoid valve comprising an interference jaw protruding in a circumferential direction from the tip of the reinforcement portion so as to protrude beyond the outer peripheral surface of the side wall surface.